Students can practice math problems, letters, writing skills and more with these 12" x 9" pockets that are open on the long side. Saves paper, time and money by eliminating copying worksheets over and over. Reusable super heavyweight pocket lasts a long time. Convenient eyelet for hanging. Cleans easily with a soft dry cloth or tissue when used with a low-odor dry erase marker or crayon (not included). Free downloadable templates at C-Line.com/template. Insert size 9" x 12".